Briefly write about diastereotopic substituents and meso compounds and give two examples each.

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

The identities of substances are the same before and after which type of change

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o